Battery device and electric device

Abstract

Embodiments of the present disclosure provide a battery device and an electric device. The battery device comprises a case, a sampling assembly, and multiple battery cell assemblies. The case comprises multiple case walls; the multiple case walls jointly enclose a mounting space; the multiple case walls include a first case wall; the first case wall is provided with a protrusion extending away from the mounting space; a groove is formed in the protrusion; and the opening of the groove faces the mounting space to enable the space inside the groove to be communicated with the mounting space. The multiple battery cell assemblies are disposed in the mounting space. The sampling assembly is used for acquiring information of the battery cell assemblies, and is at least partially located in the groove. In the battery device of the embodiments of the present disclosure, a groove is formed in a case wall to accommodate at least part of a sampling assembly, such that the waste of the space inside a case caused by arrangement of the sampling assembly is reduced, thereby enabling a more compact structure for battery devices.

Description

A battery device and an electrical device Technical Field

[0001] This disclosure relates to the field of battery device technology, specifically to a battery device and an electrical device. Background Technology

[0002] With the development of technology, the application scenarios of new energy battery devices are becoming more and more widespread in daily life and industrial production.

[0003] The battery device is composed of multiple battery cells connected in series and parallel to increase the capacity of the battery device and the charging and discharging current, thereby expanding the application range of the battery device.

[0004] Battery devices typically also include sampling components, which are electrically connected to the individual battery cells within the device to obtain information about the individual battery cells. This information helps to control the charging and discharging of the individual battery cells and ensures safe operation.

[0005] The sampling component is located inside the battery pack housing, and it also needs to share a portion of the housing volume with the individual battery cells. Therefore, it tends to increase the overall size of the housing, which is detrimental to the adaptability of the battery pack.

[0006] Summary of the Invention

[0007] In view of this, the present disclosure aims to provide a battery device and power supply device that enable a more compact arrangement of sampling components.

[0008] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0009] This disclosure provides a battery device, the battery device comprising:

[0010] The enclosure includes multiple enclosure walls that together enclose an installation space. The multiple enclosure walls include a first enclosure wall. The first enclosure wall has a protrusion that protrudes away from the installation space. The protrusion has a groove inside, and the opening of the groove faces the installation space so that the space inside the groove communicates with the installation space.

[0011] Multiple battery cell modules are located within the installation space;

[0012] A sampling component is used to acquire information about a battery cell assembly, and at least a portion of the sampling component is located within a groove.

[0013] The battery device in this embodiment forms a protrusion on the first housing wall with a groove inside the protrusion. The groove accommodates at least a portion of the sampling component, thereby reducing wasted space inside the housing due to excessive unused space beside the sampling component. Since the sampling component is typically located on the outer surface of the battery cell assembly, it usually protrudes from the surface of the battery cell assembly. Using the protrusion to form a groove to hold at least a portion of the sampling component also helps to make the space inside the housing for the battery cell assembly more regular, resulting in a more compact battery device structure. Furthermore, the fact that at least a portion of the sampling component is located within the groove formed by the protrusion also provides some protection for the sampling component. In addition, providing a protrusion on the first housing wall helps to suppress the probability of bending, twisting, or other deformations of the first housing wall, improving the overall structural strength of the housing; the protrusion also strengthens the protection of the sampling component.

[0014] In some embodiments, the battery cell assembly includes a first wall and electrode leads disposed on the first wall, and the sampling component is located on the first wall.

[0015] Both the sampling component and the electrode lead-out portion are located at least partially within the groove.

[0016] Thus, when the first casing wall has a protrusion and a groove is formed inside the protrusion, at least a portion of the sampling component and the electrode lead can be disposed within the groove. The battery cell assembly, excluding the electrode lead, can be more easily assembled within the installation space, reducing the amount of unused space within the casing caused by the placement of the electrode lead and the sampling component, thereby improving the space utilization rate of the installation space. Furthermore, since at least a portion of both the electrode lead and the sampling component are located within the groove, the protrusion can provide some protection for both the sampling component and the electrode lead.

[0017] In some embodiments, the sampling component and the electrode lead are at least partially located within the same groove. This improves the space utilization within a single groove, reduces the number of grooves, allows for a closer distance between the sampling component and the electrode lead, facilitates the acquisition of information from the electrode lead using the sampling component, and enables a shorter connection length for the sampling component, saving materials.

[0018] In some embodiments, the battery device further includes a busbar for connecting the electrode leads of different battery cell assemblies. The busbar, sampling assembly, and electrode leads are all at least partially located within the same recess. This improves space utilization within a single recess, reduces the number of recesses, facilitates the connection between the busbar and the electrode leads, or allows for closer proximity between the sampling assembly and the busbar or electrode leads, enabling the sampling assembly to collect information from the busbar or electrode leads. Furthermore, the connection length of the sampling assembly can be set shorter, saving materials.

[0019] In some embodiments, the battery cell assembly includes a first battery cell assembly, which includes a first electrode lead and a second electrode lead. The sampling assembly includes a first sampling component electrically connected to the first battery cell assembly. The groove includes a first groove, and at least a portion of the first electrode lead, the second electrode lead, and the first sampling component are located within the first groove. This improves the space utilization within the first groove and facilitates the centralized arrangement of the electrode leads on the first battery cell assembly, allowing them to be sampled uniformly by the same sampling component.

[0020] In some embodiments, the length of the first groove is greater than its width, and the distance between the farthest points of the first electrode lead and the second electrode lead along the width direction of the first groove is less than half of the maximum dimension of the first battery cell assembly along the width direction of the first groove. This allows the first and second electrode leads to be arranged more centrally on the first wall surface, reduces the size of the protrusions to decrease the overall dimensions of the battery device, and facilitates the formation of larger, more regular areas on other parts of the first wall surface, allowing for the arrangement of other components in the battery device and improving the compactness of the battery device structure.

[0021] In some embodiments, the length of the first groove is greater than its width, and in a projection plane perpendicular to the length of the first groove, the projections of the first electrode lead and the second electrode lead at least partially overlap. This helps to reduce the distance between the farthest points of the first and second electrode leads along the width of the first groove, thereby reducing the size of the protrusion along the width of the groove, reducing the overall dimensions of the battery device, and improving its adaptability. It also allows for a more concentrated arrangement of the first and second electrode leads, facilitating their shared use of the space within the first groove.

[0022] In some embodiments, the length of the first groove is greater than its width. The first battery cell assembly includes a first edge and a second edge disposed opposite to each other along the width direction of the first groove. The maximum distance between the first electrode lead and the first edge is less than the maximum distance between the first electrode lead and the second edge, and the maximum distance between the second electrode lead and the first edge is less than the maximum distance between the second electrode lead and the second edge. The sampling component is located between the first electrode lead and the second electrode lead, which is closer to the second edge. This allows the first and second electrode leads to be more concentrated in the area near the first edge. The first and second electrode leads can simultaneously extend into the first groove, resulting in a more regular surface on the first battery cell assembly closer to the second edge, and closer proximity to the area on the first casing wall without protrusions, reducing wasted space within the casing. Alternatively, the space on the side of the first and second electrode leads facing the second edge can be used to place other components, such as the sampling component. The sampling component can also extend at least partially into the first groove to utilize a portion of the space within the first groove.

[0023] In some embodiments, the first sampling component is located on the same side of the first electrode lead and the second electrode lead along the groove width direction of the first groove. This eliminates the need for the first sampling component to be installed between the first and second electrode leads, simplifying installation. Furthermore, since the busbar needs to connect to both the first and second electrode leads, installing the first sampling component on one side of both reduces the likelihood of interference between the busbar and the first sampling component. Because the first sampling component is located on one side of both the first and second electrode leads, the closely spaced first and second electrode leads can be arranged more centrally. This arrangement of the first sampling component allows for more efficient use of the more regular area beside the first and second electrode leads, resulting in more rational use of the internal space of the battery device.

[0024] In some embodiments, the first sampling component includes a main body and a terminal portion. The main body is attached to the first wall surface and offset from the electrode lead-out portion. The terminal portion is connected to the main body and the battery cell assembly. This offset arrangement of the main body and the electrode lead-out portion avoids direct contact between them, reducing the adverse impact of the electrode lead-out portion on the accuracy of the sampling information of the sampling component. Simultaneously, the larger size of the main body facilitates its placement on a regular area formed on the first wall surface, reducing the probability of interference between the main body and other components.

[0025] In some embodiments, the battery device further includes a busbar, with the terminal portion at least partially bent to connect to at least one of the electrode leads and the busbar. When the electrode leads and the main body have different dimensions in the direction perpendicular to the first casing wall, they can be connected by bending the terminal portion, facilitating the placement of the first electrode lead, the second electrode lead, and the first sampling assembly within the first groove. Furthermore, when the battery cell assembly expands or shifts, the deformation of the bent portion of the terminal portion can reduce the tensile force between the terminal portion and the main body, thereby reducing the probability of damage to the first sampling assembly under tensile force and extending the service life of the first sampling assembly.

[0026] In some embodiments, the first sampling component is located on one side of the first electrode lead and the second electrode lead along the groove width direction of the first groove. The space within the first groove includes a first accommodating space and a second accommodating space. The maximum dimension of the first accommodating space along the groove depth direction of the first groove is smaller than the maximum dimension of the second accommodating space along the groove depth direction of the first groove. The first accommodating space is used to accommodate at least a portion of the sampling component, and the second accommodating space is used to accommodate at least a portion of the first electrode lead and at least a portion of the second electrode lead. This helps to reduce wasted space within the first groove, reduces the overall volume of the first groove, and consequently reduces the outer contour dimensions of the protrusion.

[0027] In some embodiments, the first sampling component is located on the side of the first electrode lead-out portion and the second electrode lead-out portion facing the bottom wall of the first groove. This simplifies the internal shape of the first groove, facilitates its manufacturing, and also allows the first sampling component to be positioned closer to the first electrode lead-out portion and the second electrode lead-out portion.

[0028] In some embodiments, the battery cell assembly includes a first electrode lead-out, a sampling assembly includes a first sampling component connected to the first electrode lead-out, and a protrusion includes a first protrusion and a second protrusion, which are spaced apart on a first casing wall. A first recess is formed within the first protrusion, and a second recess is formed within the second protrusion. The first recess is used to accommodate at least a portion of the first sampling component, and the second recess is used to accommodate at least a portion of the first electrode lead-out. Thus, when the sampling component is located a considerable distance from the electrode lead-out, the overall volume of each protrusion is reduced, thereby improving the space utilization within the protrusion.

[0029] In some embodiments, the battery cell assembly includes a first wall and a second wall, with the sampling component located on the first wall and the second wall having an electrode lead-out portion. The first wall faces the first tank wall. This approach simplifies the arrangement by requiring only consideration of the fit between the sampling component and the groove size, improving layout flexibility and reducing the design and manufacturing difficulty of the groove.

[0030] In some embodiments, the protrusion includes a third protrusion located on the first housing wall, the third protrusion having a second groove with an opening facing the mounting space, at least a portion of the sampling component being located in the second groove;

[0031] The multiple enclosure walls also include a second enclosure wall, and the protrusions also include a fourth protrusion located on the second enclosure wall. The fourth protrusion has a third groove with an opening facing the mounting space, and at least a portion of the electrode leads is located in the third groove. In this way, the grooves located on different enclosure walls can accommodate sampling components and electrode leads located on different wall surfaces, improving the flexibility of arrangement and further contributing to the structural compactness of the battery device.

[0032] In some embodiments, the third protrusion is located at the end of the first housing wall near the second housing wall, and the fourth protrusion is located at the end of the second housing wall near the first housing wall. This facilitates shortening the distance between the third and fourth protrusions, thereby allowing the sampling component to be closer to the electrode leads for electrical connection, reducing the size of the sampling component, and consequently reducing the size of the third protrusion.

[0033] In some embodiments, the battery cell assembly is a single battery cell, which helps to simplify the internal structure of the battery device, reduce the number of components in the battery device, and improve the energy density of the battery device; or, the battery cell assembly includes a housing and multiple battery cells housed within the housing; in this way, the housing helps to maintain the external contour of the battery cell assembly, especially when the battery cells are pouch cells, which facilitates the orderly and stable placement of the battery cell assembly inside the battery device, improves the space utilization within the battery device, and enhances the safety of use; furthermore, multiple battery cells located in the housing of the same battery cell assembly can be connected externally using the same set of electrode leads, resulting in a simple structure.

[0034] In some embodiments, the first housing wall includes a body portion and a protrusion portion, the protrusion portion protruding from the body portion in a direction away from the installation space, and the maximum protrusion size of the protrusion portion is less than or equal to 10 mm. This reduces the manufacturing difficulty of forming the protrusion portion, which helps to reduce manufacturing costs; at the same time, it helps to reduce the probability of interference between the protrusion portion and other objects outside the battery device, which helps to improve the adaptability of the battery device.

[0035] This disclosure also provides an electrical device, wherein the electrical device includes a battery device according to any of the foregoing embodiments, and the battery device is used to provide electrical energy to the electrical device.

[0036] Thus, by improving the compactness of the battery device structure, it is beneficial to improve the compactness of the arrangement of other components in the electrical device and improve space utilization.

[0037] In some embodiments, the electrical device is a vehicle, which also includes a frame on which the battery device is mounted.

[0038] The frame has a storage compartment, and part of the protrusion extends into the storage compartment.

[0039] In this way, the combination of the storage compartment and the protrusion allows part of the battery device to utilize the space inside the vehicle frame, thereby improving the space utilization of the vehicle and increasing the capacity of the battery device in the vehicle.

[0040] In some embodiments, the frame includes a mounting beam disposed on one side of the battery pack along the vehicle height direction. The mounting beam has a receiving compartment that opens along the vehicle height direction toward the battery pack, forming an opening. At least a portion of the protrusion extends into the receiving compartment through the opening. This improves the utilization of the internal space of the mounting beam, which is beneficial for increasing the battery pack capacity in the vehicle.

[0041] In some embodiments, the vehicle includes a passenger compartment, with a first wall forming the passenger compartment floor of the vehicle.

[0042] This helps reduce the number of parts in a vehicle and improves the compactness of the vehicle structure. Attached Figure Description

[0043] Figure 1 is a schematic diagram of an embodiment of the present disclosure in which the electrical device is a vehicle;

[0044] Figure 2 is an exploded schematic diagram of a battery device according to an embodiment of the present disclosure;

[0045] Figure 3 is a schematic diagram of the battery device in the first embodiment of this disclosure;

[0046] Figure 4 is a schematic diagram of the embodiment in Figure 3 from another perspective;

[0047] Figure 5 is a partial cross-sectional schematic diagram of a battery device according to an embodiment of the present disclosure;

[0048] Figure 6 is a partially enlarged schematic diagram of position B in the embodiment shown in Figure 5;

[0049] Figure 7 is a partial cross-sectional view of position AA in Figure 3;

[0050] Figure 8 is a schematic diagram of the first box wall in one embodiment of this disclosure;

[0051] Figure 9 is a schematic diagram of the arrangement of the battery cell assembly, the busbar and the sampling assembly in one embodiment of the present disclosure;

[0052] Figure 10 is a schematic diagram of a battery cell assembly according to an embodiment of the present disclosure in one embodiment;

[0053] Figure 11 is a partial cross-sectional view of the battery device in the second embodiment of this disclosure, and the cross-section position is the same as position AA in Figure 3;

[0054] Figure 12 is a partial cross-sectional schematic diagram of the battery device in the third embodiment of this disclosure, and its cross-section position is the same as position AA in Figure 3;

[0055] Figure 13 is a partial cross-sectional view of the battery device in the fourth embodiment of this disclosure, and the cross-section position is the same as position AA in Figure 3.

[0056] Figure 14 is a partial cross-sectional schematic diagram of the battery device in the fifth embodiment of this disclosure, and its cross-sectional position is the same as position AA in Figure 3;

[0057] Figure 15 is a schematic diagram of a battery cell assembly according to an embodiment of the present disclosure in another embodiment;

[0058] Figure 16 is a cross-sectional schematic diagram of a vehicle according to an embodiment of the present disclosure;

[0059] Figure 17 is a magnified view of a portion of position C in Figure 16;

[0060] Figure 18 is a cross-sectional schematic diagram of a vehicle according to another embodiment of this disclosure. Detailed Implementation

[0061] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this disclosure can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this disclosure and should not be regarded as undue limitations on this disclosure.

[0062] Unless otherwise defined, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having” and any variations thereof in the specification and the foregoing description of this disclosure are intended to cover non-exclusive inclusion.

[0063] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0064] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this disclosure can be combined with other embodiments.

[0065] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this disclosure generally indicates that the preceding and following related objects are in an "or" relationship.

[0066] In the description of the embodiments of this disclosure, for ease of explanation, as shown by the arrows in FIG3, the direction of arrow F1 is the groove length direction; as shown by the arrows in FIG3, FIG4, FIG7, FIG8, and FIG9, the direction of arrow F2 is the groove height direction; as shown by the arrows in FIG7, FIG16, and FIG18, the direction of arrow F3 is the groove depth direction; and as shown by the arrows in FIG16 and FIG18, the direction of arrow F3 is the vehicle height direction.

[0067] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0068] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0069] Currently, battery devices are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As the application areas of battery devices continue to expand, the market demand is also constantly increasing.

[0070] The battery cell involved in this disclosure embodiment may include an electrode assembly and an electrolyte. The electrode assembly may consist of a positive electrode, a negative electrode, and a separator. This type of battery cell can operate by relying on the movement of metal ions between the positive and negative electrode. The positive electrode may include a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the current collector without the positive active material layer protrudes from the current collector coated with the positive active material layer. The current collectors without the positive active material layer are stacked together to form the positive electrode tab. Taking a lithium-ion battery device as an example, the material of the positive current collector may be aluminum, and the positive active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode may include a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the current collector without the negative active material layer protrudes from the current collector coated with the negative active material layer. The current collectors without the negative active material layer are stacked together to form the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure. Additionally, the battery cell involved in the embodiments of this disclosure can also be a solid-state battery cell.

[0071] A single battery cell can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged after it has been discharged, allowing the active materials to be activated and the cell to continue to be used.

[0072] The battery cells mentioned in this disclosure may be lithium-ion battery devices, sodium-ion battery devices, sodium-lithium-ion battery devices, lithium metal battery devices, sodium metal battery devices, lithium-sulfur battery devices, magnesium-ion battery devices, nickel-metal hydride battery devices, nickel-cadmium battery devices, lead-acid battery devices, etc., and the embodiments of this disclosure are not limited to these.

[0073] The battery cells mentioned in this disclosure can be cylindrical battery cells, prismatic battery cells, pouch battery cells, or other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery devices, such as hexagonal prismatic battery devices. There are no particular limitations on the embodiments of this disclosure.

[0074] Emissions from individual battery cells mentioned in this disclosure include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0075] The battery apparatus mentioned in the embodiments of this disclosure may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include one or more battery cells. When a battery cell assembly is formed from multiple battery cells, the multiple battery cells can be connected in series, parallel, or in a mixed configuration via a busbar. When a battery cell assembly includes only one battery cell, the battery apparatus can form a corresponding supply voltage and capacity by connecting multiple battery cell assemblies in series, parallel, or in a mixed configuration.

[0076] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0077] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0078] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0079] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0080] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0081] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0082] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0083] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0084] Figure 2 is an exploded perspective view of the battery device 10 provided in an embodiment of this disclosure. As shown in Figure 2, the battery device 10 includes a housing 11 and at least one battery cell assembly 12.

[0085] The housing 11 includes a top cover 115 and a bottom plate 116. The top cover 115 covers the bottom plate 116, thereby creating an installation space between the bottom plate 116 and the top cover 115 for placing the battery cell assembly 12.

[0086] The technical solutions described in this disclosure are applicable to various electrical devices that use battery cells and battery devices 10, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0087] In this disclosure, the battery device 10 refers to a single physical module comprising one or more battery cell assemblies 12 to provide higher voltage and capacity.

[0088] The electrical devices involved in this disclosure embodiment are powered by the aforementioned battery device. These devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0089] In the following embodiments, for ease of explanation, a vehicle 100 is used as an example of an electrical device according to an embodiment of this disclosure. The description is as follows, in conjunction with the accompanying drawings.

[0090] Figure 1 is a schematic diagram of the structure of a vehicle 100 provided in an embodiment of this disclosure. The vehicle 100 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. As shown in Figure 1, a battery device 10 is provided inside the vehicle 100. The battery device 10 can be located at the bottom, front, or rear of the vehicle 100. The battery device 10 can be used to power the vehicle 100; for example, the battery device 10 can serve as the operating power source for the vehicle 100. The vehicle 100 may also include a controller 30 and a motor 40. The controller 30 is used to control the battery device 10 to supply power to the motor 40, for example, to meet the power needs of the vehicle 100 during starting, navigation, and driving.

[0091] In some embodiments of this disclosure, the battery device 10 can not only serve as the operating power source for the vehicle 100, but also as the driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0092] The embodiments of this disclosure will now be described in detail.

[0093] The battery pack includes a housing, a sampling component, and individual battery cells, with both the individual battery cells and the sampling component housed inside the housing. The sampling component makes direct or indirect contact with the individual battery cells to obtain information about them and transmits this information to the Battery Management System (BMS). The BMS then uses this information to determine the operating status of the battery pack and adjust the charging and discharging states of the individual battery cells accordingly.

[0094] Because the shape and size of the sampling components differ from those of the individual battery cells, and the space inside the casing is generally more regular, a larger gap is needed between the individual battery cells and the inner walls of the casing to accommodate the sampling components. However, since the sampling components typically do not need to completely fill this space, some space is wasted. This hinders the increase in the volume of the individual battery cells, and consequently, the further improvement of the battery pack's capacity.

[0095] Based on the above problems, the present disclosure aims to provide a battery device in which a groove is provided on the casing wall of the battery device, the groove is connected to the installation space for accommodating the battery cell assembly, and at least part of the sampling component is disposed in the groove, so as to reduce the space occupied by the sampling component in the installation space and improve the space utilization of the battery device.

[0096] Specifically, referring to Figures 3 to 7, the battery device 10 includes a housing 11, a sampling component 13, and multiple battery cell components 12.

[0097] The housing 11 includes multiple housing walls 110, which together enclose an installation space 11a. Each housing wall 110 includes a first housing wall 111, which has a protrusion 112 extending away from the installation space 11a. The protrusion 112 has a groove 112a, with an opening 11b facing the installation space 11a to communicate with it. Multiple battery cell assemblies 12 are disposed within the installation space 11a. A sampling assembly 13 is used to acquire information from the battery cell assemblies 12, and at least a portion of the sampling assembly 13 is located within the groove 112a. The housing 11 provides a placement location for the battery cell assemblies 12 and the sampling assembly 13, and also serves to protect them.

[0098] Box wall 110 refers to the structure that forms the outer surface of box body 11. It can be understood that the top cover 115 and the bottom plate 116 can each form one or more box walls 110.

[0099] The first box wall 111 refers to a box wall 110 among the multiple box walls 110 that has a protrusion 112 and a groove 112a. The first box wall 111 can be on the top cover 115 or on the bottom plate 116.

[0100] A portion of the surface of the box wall 110 facing the installation space 11a is recessed in the direction away from the installation space 11a to form a groove 112a, and the same portion of the surface facing away from the installation space 11a protrudes in the direction away from the installation space 11a to form a protrusion 112.

[0101] The battery cell assembly 12 can refer to a single battery cell 124, or it can be a unit formed by multiple battery cells 124 being electrically connected to each other in series or parallel.

[0102] Battery cell 124 is the smallest dividing component in battery device 10 that can achieve charging and discharging functions through electrochemical reactions.

[0103] The sampling component 13 is used to contact and electrically connect with the battery cell assembly 12 to obtain information such as the temperature and voltage of the battery cell assembly 12.

[0104] At least a portion of the sampling component 13 is located in the groove 112a. This can be either a portion of the sampling component 13 being located in the groove 112a or the entire sampling component 13 being located in the groove 112a.

[0105] In this embodiment of the present disclosure, a protrusion 112 can be formed on the first housing wall 110 and a groove 112a can be provided inside the protrusion 112. The positions of the protrusion 112 and the groove 112a can be adapted to the setting of the sampling component 13. By setting at least a portion of the sampling component 13 in the groove 112a, the portion of the first housing wall 111 without the protrusion 112 can be set closer to the battery cell assembly 12. This also reduces the amount of unused space near the sampling component 13, thereby reducing the waste of space inside the housing 11 for arranging the sampling component 13. It also makes the space inside the housing 11 for placing the battery cell assembly 12 more regular, and makes the structure of the battery device 10 more compact and the space inside the battery device 10 more rationally utilized. In addition, by forming the protrusion 112, the protrusion 112 on the first housing wall 111 also helps to reduce the probability of the first housing wall 111 bending, twisting and other deformations, improves the overall structural strength of the housing 11, and the sampling component 13 is at least partially located inside the protrusion 112, which can also be used to strengthen the protection of the sampling component 13.

[0106] The specific method of forming the protrusion 112 is not limited. For example, a portion of the first box wall 111 can be stamped by a mold to form the protrusion 112 and the groove 112a on both sides of the box wall 110, or the first box wall 111 can also be formed by molding to form the protrusion 112 and the groove 112a.

[0107] In some embodiments, referring to FIG6, at least a portion of the sampling component 13 is placed on the surface of the battery cell assembly 12.

[0108] The battery cell assembly 12 is provided with an electrode lead-out portion 122, which is used to output or input current to the battery cell assembly 12. The electrode lead-out portion 122 may protrude from the surface of the battery cell assembly 12.

[0109] In an embodiment with electrode lead-out portion 122, referring to Figures 6 and 7, the battery cell assembly 12 includes a first wall surface 121 and an electrode lead-out portion 122 disposed on the first wall surface 121. The sampling component 13 is located on the first wall surface 121, and both the sampling component 13 and the electrode lead-out portion 122 are at least partially located in the groove 112a.

[0110] The term "wall" refers to the structure that forms the outer surfaces of each battery cell module 12. It is understood that the battery cell module 12 may have one or more walls.

[0111] The first wall 121 is the wall in which the electrode lead-out portion 122 is provided in each wall of the battery cell assembly 12.

[0112] Thus, when the first housing wall 111 has a protrusion 112 and a groove 112a is formed inside the protrusion 112, at least a portion of the sampling component 13 and the electrode lead-out portion 122 can be disposed within the groove 112a. The portion of the battery cell assembly 12, excluding the electrode lead-out portion 122, can be more easily assembled within the installation space 11a, reducing the amount of unused space within the housing caused by the placement of the electrode lead-out portion 122 and the sampling component 13, thereby improving the space utilization rate of the installation space 11a. Furthermore, since at least a portion of both the electrode lead-out portion 122 and the sampling component 13 are located within the groove 112a, the protrusion 112 can provide some protection for both the sampling component 13 and the electrode lead-out portion 122.

[0113] It is understandable that the number of protrusions 112 and grooves 112a can be one or more. The number of the two can be one-to-one, or the protrusions 112 can include multiple grooves 112a.

[0114] It is understandable that during the operation of the battery device 10, the electrode leads 122 are prone to heat generation due to the continuous flow of current.

[0115] In some embodiments, referring to Figures 6 and 7, the sampling component 13 and the electrode lead-out portion 122 are at least partially located within the same groove 112a.

[0116] This is beneficial for improving the space utilization rate within a single groove 112a, reducing the number of grooves 112a, and bringing the sampling component 13 and electrode lead-out portion 122 closer together, making it easier to collect information from the electrode lead-out portion 122 using the sampling component 13. Furthermore, the connection length of the sampling component 13 can be set to be shorter, saving materials.

[0117] The specific information collected by the sampling component 13 from the electrode lead 122 is not limited, such as voltage value, current value, temperature value, etc.

[0118] In some embodiments, referring to FIG6, the battery device 10 further includes a busbar 14 for connecting the electrode leads 122 of different battery cell assemblies 12, so as to realize series and parallel electrical connections between the battery cell assemblies 12.

[0119] Understandably, during operation, the busbar 14 will carry current and generate heat.

[0120] In some embodiments where a busbar 14 is provided, referring to Figures 6 and 7, the busbar 14, the sampling assembly 13, and the electrode lead-out portion 122 are all located at least partially within the same groove 112a.

[0121] This is beneficial for improving the space utilization rate within a single groove 112a and reducing the number of grooves 112a; it also facilitates the connection between the busbar 14 and the electrode lead-out portion 122, or it allows the sampling component 13 to be closer to the busbar or electrode lead-out portion 122, making it easier to collect information from the busbar or electrode lead-out portion 122 using the sampling component 13. Furthermore, the connection length of the sampling component 13 can be set to be shorter, saving materials.

[0122] The specific information collected by the sampling component 13 from the bus 14 is not limited, such as voltage value, current value, temperature value, etc.

[0123] In some embodiments, referring to FIG7, the battery cell assembly 12 includes a first battery cell assembly 12a, the first battery cell assembly 12a includes a first electrode lead-out portion 1221 and a second electrode lead-out portion 1222, the sampling assembly 13 includes a first sampling assembly 130, the first sampling assembly 130 is electrically connected to the first battery cell assembly 12a, the groove 112a includes a first groove 112b, and the first electrode lead-out portion 1221, the second electrode lead-out portion 1222 and the first sampling assembly 130 are all at least partially located in the first groove 112b.

[0124] The polarities of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 can be the same or different. For example, one of them may be positive and the other may be negative.

[0125] The first groove 112b refers to the groove 112a that can accommodate at least a portion of the first electrode lead-out 1221, at least a portion of the second electrode lead-out 1222, and at least a portion of the first sampling component 130.

[0126] This is beneficial for improving the space utilization rate within the first groove 112b, and also facilitates the centralized arrangement of the electrode leads 122 on the first battery cell assembly 12a and their unified sampling by the same sampling component 13.

[0127] It is understood that in embodiments where there are multiple grooves 112a, some grooves 112a may be the first grooves 112b, or all grooves 112a may be the first grooves 112b.

[0128] In some embodiments, referring to FIG8, the length of the first groove 112b is greater than its width.

[0129] The groove length of the first groove 112b refers to the dimension of the projected length of the first groove 112b in the projection plane perpendicular to the concave direction of the first groove 112b, i.e., L1 in Figure 8.

[0130] The groove width of the first groove 112b refers to the dimension of the projected width of the first groove 112b in the projection plane perpendicular to the concave direction of the first groove 112b, i.e., L2 in Figure 8. That is, L1 > L2.

[0131] The straight line direction of the groove length of the first groove 112b, i.e. the groove length direction, is perpendicular to the straight line direction of the groove width of the first groove 112b, i.e. the groove width direction.

[0132] In some embodiments where the length of the first groove 112b is greater than its width, referring to FIG9, the distance between the farthest points of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the width direction of the first groove 112b is less than half of the maximum dimension of the first battery cell assembly 12a along the width direction of the first groove 112b.

[0133] The distance between the farthest points of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b refers to the distance L3 between the two farthest points on the projection plane of the outline of the first electrode lead-out portion 1221 and the outline of the second electrode lead-out portion 1222 in the projection plane perpendicular to the concave direction of the first groove 112b.

[0134] The maximum dimension of the first battery cell assembly 12a along the width of the first groove 112b is L4. In other words, L4 > L3.

[0135] This allows the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 to be arranged more centrally on the first wall surface 121, which helps to reduce the size of the protrusion 112 and thus reduce the outer contour size of the battery device 10; it also helps to form a larger regular area in other parts of the first wall surface 121 so that other components in the battery device 10 can be arranged, thereby improving the compactness of the battery device 10 structure.

[0136] It is understandable that the length direction of the groove, the width direction of the groove, and the concave direction of the groove 112a are perpendicular to each other.

[0137] It is understood that, referring to Figure 9, at least a portion of the sampling component 13 can be placed within the regular area formed by the concentrated arrangement of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 on the first wall surface 121.

[0138] It is understandable that, referring to Figure 9, multiple battery cell assemblies 12 are arranged along the length of the first groove 112b.

[0139] In some embodiments where the length of the first groove 112b is greater than its width, referring to Figures 9 and 10, in a projection plane perpendicular to the length of the first groove 112b, the projection of the first electrode lead-out portion 1221 and the projection of the second electrode lead-out portion 1222 at least partially overlap.

[0140] In other words, at least a portion of the lead-out portion of the first battery device 10 is disposed opposite to the second lead-out portion along the groove length direction of the first groove 112b.

[0141] This helps to reduce the distance between the farthest points of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b, thereby helping to reduce the size of the protrusion 112 along the groove width direction, which in turn helps to reduce the outer contour size of the battery device 10 and improve the adaptability of the battery device 10; it also helps to make the arrangement of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 more concentrated, making it easier for both to enter the first groove 112b.

[0142] In some embodiments where the length of the first groove 112b is greater than its width, referring to Figures 9 and 10, the first battery cell assembly 12a includes a first edge 12b and a second edge 12c disposed opposite each other along the width direction of the first groove 112b. The maximum distance between the first electrode lead-out portion 1221 and the first edge 12b is less than the maximum distance between the first electrode lead-out portion 1221 and the second edge 12c, and the maximum distance between the second electrode lead-out portion 1222 and the first edge 12b is less than the maximum distance between the second edge 12c. The sampling assembly 13 is located between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, which is closer to the second edge 12c.

[0143] The first edge 12b refers to the boundary of one end of the first wall 121 along the groove width direction; the second edge 12c refers to the boundary of the other end of the first wall 121 along the groove width direction.

[0144] Referring to Figure 10, the maximum distance between the first electrode lead-out portion 1221 and the first edge 12b is L5, and the maximum distance between the first electrode lead-out portion 1221 and the second edge 12c is L6. L5 < L6, which means that the first electrode lead-out portion 1221 is offset along the groove width direction on the first wall surface 121.

[0145] Referring to Figure 10, the maximum distance between the second electrode lead-out portion 1222 and the first edge 12b is L7, and the maximum distance between the second electrode lead-out portion 1222 and the second edge 12c is L8. L7 < L8, which means that the second electrode lead-out portion 1222 is offset along the groove width direction on the first wall surface 121.

[0146] It is understandable that, since L5 < L6 and L7 < L8, the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 are both offset on the first wall surface 121 along the groove width direction towards the side close to the first edge 12b. This results in the area of ​​the first wall surface 121 between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 and the second edge 12c being larger than the area of ​​the first wall surface 121 between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 and the first edge 12b.

[0147] In this way, the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 can be more concentrated towards the first edge 12b. The first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 can simultaneously extend into the first groove 112b. Thus, the surface of the first battery cell assembly 12a closer to the second edge 12c is more regular and can be closer to the area on the first casing wall 111 without the protrusion 112, reducing the waste of space inside the casing 11. Alternatively, the space on the side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 facing the second edge 12c can be used to place other components, such as the sampling component 13. The sampling component 13 can also extend at least partially into the first groove 112b to utilize part of the space in the first groove 112b.

[0148] In some embodiments, referring to Figures 7 and 9, the first sampling component 130 is located on the same side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b.

[0149] The sampling component 13 may be located on the side of the first electrode lead-out portion 1221 away from the second electrode lead-out portion 1222 along the groove width direction, or the sampling component 13 may be located on the side of the second electrode lead-out portion 1222 away from the first electrode lead-out portion 1221 along the groove width direction.

[0150] Thus, the first sampling component 130 does not need to be installed between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, making installation easier. Furthermore, since the busbar 14 needs to connect to both the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, installing the first sampling component 130 on one side of both portions reduces the probability of interference between the busbar 14 and the first sampling component 130. Because the first sampling component 130 is located on one side of both the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, the relatively similar-sized first electrode lead-out portions 1221 and 1222 can be arranged more centrally. This arrangement of the first sampling component 130 allows for more efficient use of the more regular area beside the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, resulting in more rational use of the internal space of the battery device 10. It is understandable that the sampling component 13 can be electrically connected to multiple battery cell components 12 and transmit the information collected from each battery cell component 12 to the BMS.

[0151] In some embodiments, the sampling component 13 includes a main body 131 and a terminal portion 132. The main body 131 is attached to the first wall surface 121 and is offset from the electrode lead-out portion 122. The terminal portion 132 is connected to the main body 131 and the battery cell assembly 12.

[0152] Terminal 132 is used to collect information required by the object it contacts. Terminal 132 can be used to contact components in the battery device 10 such as busbar 14 and electrode lead-out section 122.

[0153] The main body 131 is used to collect the information collected by the terminal 132 and transmit the information to the BMS.

[0154] Thus, the main body 131 and the electrode lead-out portion 122 are misaligned, avoiding direct contact between the two and reducing the adverse impact of the electrode lead-out portion 122 on the accuracy of the sampling information of the sampling component 13; at the same time, the main body 131 is larger in size, which is conducive to arranging the main body 131 on the regular area formed on the first wall surface 121, reducing the probability of the main body 131 interfering with other components.

[0155] It is understandable that there are multiple terminal portions 132, which are used to collect information from different battery cell assemblies 12 and different busbars 14.

[0156] In an embodiment where multiple battery cell assemblies 12 are arranged along the length of the slot, referring to FIG9, the main body 131 extends along the length of the slot, and multiple terminal portions 132 are arranged along the length of the slot to collect information of each battery cell assembly 12 and the busbar 14 electrically connected to each battery cell assembly 12.

[0157] Understandably, during the use of the battery device 10, due to the electrochemical reaction, the battery cell assembly 12 will expand to a certain extent, and the terminal portion 132 will change position as the battery cell assembly 12 expands, while the main body portion 131 will not. Especially in the arrangement direction of multiple battery cell assemblies 12, the cumulative expansion deformation of each battery cell assembly 12 will cause a large change in the position of the main body portion 131 relative to each terminal portion 132, resulting in a tensile force between the main body portion 131 and the terminal portion 132, which can easily cause damage to the sampling component 13.

[0158] In some embodiments with busbar 14, referring to FIG9, terminal portion 132 is at least partially bent to connect to at least one of electrode lead-out portion 122 and busbar 14.

[0159] Thus, when the electrode lead-out portion 122 and the main body portion 131 have different dimensions in the direction perpendicular to the first casing wall 111, they can be connected by bending the terminal portion 132, facilitating the placement of the first electrode lead-out portion 1221, the second electrode lead-out portion 1222, and the first sampling assembly 130 within the first groove 112b. Furthermore, when the battery cell assembly 12 expands or shifts, the deformation of the bent portion of the terminal portion 132 can reduce the tensile force between the terminal portion 132 and the main body portion 131, thereby reducing the probability of damage to the sampling assembly 13 under tensile force and extending the service life of the sampling assembly 13.

[0160] The specific type of sampling component 13 is not limited; for example, at least part of sampling component 13 may be an FPC (Flexible Printed Circuit).

[0161] It is understandable that the dimensions of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the recessed direction of the groove 112a are different from the dimensions of the sampling component 13 along the recessed direction of the groove 112a.

[0162] In some embodiments, referring to FIG7, the first sampling component 130 is located on one side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b. The space in the first groove 112b includes a first accommodating space 112c and a second accommodating space 112d. The maximum dimension of the first accommodating space 112c along the groove depth direction of the first groove 112b is smaller than the maximum dimension of the second accommodating space 112d along the groove depth direction of the first groove 112b. The first accommodating space 112c is used to accommodate at least a portion of the sampling component 13, and the second accommodating space 112d is used to accommodate at least a portion of the first electrode lead-out portion 1221 and at least a portion of the second electrode lead-out portion 1222.

[0163] The groove depth direction, that is, the concave direction of groove 112a.

[0164] The maximum dimension of the first receiving space 112c along the depth direction of the first groove 112b is L9; the maximum dimension of the second receiving space 112d along the depth direction of the first groove 112b is L10.

[0165] L9 < L10, making the inner wall of the first groove 112b stepped. The first receiving space 112c is used to receive the sampling component 13, such that the dimension of the first receiving space 112c along the groove depth direction is adapted to the dimension of the sampling component 13 along the groove depth direction; the second receiving space 112d is used to receive the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, such that the dimension of the first receiving space 112c along the groove depth direction is adapted to the dimension of the first electrode lead-out portion 1221 along the groove depth direction and the dimension of the second electrode lead-out portion 1222 along the groove depth direction.

[0166] This helps to reduce the waste of space in the first groove 112b, reduces the total volume of the first groove 112b, and consequently reduces the outer contour dimensions of the protrusion 112.

[0167] In some embodiments, referring to FIG8, there are two first accommodating spaces 112c and one second accommodating space 112d, with the two first accommodating spaces 112c located on one side of the second accommodating space 112d along the groove width direction.

[0168] Each first accommodating space 112c is used to accommodate one sampling component 13, and the second accommodating space 112d can accommodate two sets of battery cell components 12 arranged side by side along the slot width direction, each set including multiple battery cell components 12 arranged along the slot length direction.

[0169] This allows more electrode leads 122 and sampling components 13 to share the same groove 112a, which helps reduce the number of protrusions 112 on the box wall 110 and further improves the compactness of the battery device 10 structure.

[0170] It is understood that, referring to Figure 7, the protrusion 112 includes two parts with different maximum dimensions along its protrusion direction. The first receiving space 112c is located in one part, and the second receiving space 112d is located in the other part. This makes it easier for each part of the protrusion 112 to maintain a consistent wall thickness and facilitates the processing and manufacturing of the protrusion 112.

[0171] In some embodiments, referring to FIG11, the first sampling component 130 is located on the side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 facing the bottom wall of the first groove 112b.

[0172] The bottom wall of the first groove 112b refers to the inner wall of the first groove 112b away from its opening along the groove depth direction.

[0173] The first sampling component 130 is located between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222, which are located between the groove bottom wall of the first groove 112b along the groove depth direction of the groove 112a.

[0174] This simplifies the internal shape of the first groove 112b, making it easier to manufacture the first groove 112b. At the same time, it also makes it easier for the first sampling component 130 to be close to the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222.

[0175] The specific number of protrusions 112 is not limited; there can be one or more.

[0176] In some embodiments, referring to FIG12, the battery cell assembly 12 includes a first electrode lead-out portion 1221, the sampling assembly 13 includes a first sampling assembly 130, the first sampling assembly 130 is connected to the first electrode lead-out portion 1221, the protrusion 112 includes a first protrusion 1121 and a second protrusion 1122, the first protrusion 1121 and the second protrusion 1122 are spaced apart on the first casing wall 111, a first recess 1121a is formed in the first protrusion 1121, a second recess 1122a is formed in the second protrusion 1122, the first recess 1121a is used to accommodate at least a portion of the first sampling assembly 130, and the second recess 1122a is used to accommodate at least a portion of the first electrode lead-out portion 1221.

[0177] The first recess 1121a and the second recess 1122a are independent grooves 112a.

[0178] In other words, the groove 112a used to accommodate the first sampling component 130 is not the same groove 112a used to accommodate the first electrode portion.

[0179] Thus, when the sampling component 13 is located far from the electrode lead-out portion 122, the total volume of each protrusion 112 is reduced to improve the space utilization rate within the protrusion 112.

[0180] In some embodiments where a main body portion 131 and a terminal portion 132 are provided, at least a portion of the main body portion 131 is located in a first recess 1121a, and the terminal portion 132 enters from the mounting space 11a into a second recess 1122a and connects to the first electrode lead-out portion 1221.

[0181] In some embodiments, referring to Figures 13 and 14, the battery cell assembly 12 includes a first wall 121 and a second wall 123, the sampling assembly 13 is located on the first wall 121, the second wall 123 is provided with an electrode lead-out portion 122, and the first wall 121 faces the first box wall 111.

[0182] In other words, the sampling component 13 and the electrode lead-out portion 122 are arranged on different wall surfaces of the battery cell assembly 12.

[0183] In this way, only the size of the sampling component 13 and the groove 112a needs to be considered, which improves the flexibility of the arrangement and reduces the design and manufacturing difficulty of the groove 112a.

[0184] In some embodiments, referring to Figures 13 and 14, the first wall surface 121 and the second wall surface 123 are two adjacent and connected walls.

[0185] It is understood that in some embodiments, some electrode leads 122 are provided on the first wall surface 121, and other electrode leads 122 are provided on the second wall surface 123.

[0186] It is understood that in some embodiments, the outer surface of the electrode lead-out portion 122 is flush with the second wall surface 123. Therefore, the groove 112a may be provided only in the first box wall 111 opposite to the first wall surface 121.

[0187] In some embodiments, referring to Figures 13 and 14, the protrusion 112 includes a third protrusion 1123 located on the first housing wall 111, the third protrusion 1123 having an opening 11b facing the mounting space 11a and at least a portion of the sampling component 13 located in the second groove 1123a; the plurality of housing walls 110 also include a second housing wall 113, the protrusion 112 further includes a fourth protrusion 1131 located on the second housing wall 113, the fourth protrusion 1131 having an opening 11b facing the mounting space 11a and at least a portion of the electrode lead-out portion 122 located in the third groove 112a.

[0188] The third protrusion 1123 and the fourth protrusion 1131 are located on different boxes 110.

[0189] In this way, the grooves 112a located on different boxes 110 can accommodate the sampling components 13 and electrode leads 122 located on different walls, which improves the flexibility of the arrangement and further helps to improve the structural compactness of the battery device 10.

[0190] It should be noted that, since there can be multiple sampling components 13 and multiple electrode components, in the embodiment with a third protrusion 1123 and a fourth protrusion 1131, a first protrusion 1121 and a second protrusion 1122 may also be provided, or the first protrusion 1121 and the second protrusion 1122 may not be provided.

[0191] In some embodiments, referring to Figures 13 and 14, the first box wall 111 and the second box wall 113 are two adjacent box walls 110.

[0192] The specific number of the first box wall 111 and the second box wall 113 is not limited; they can be one or more.

[0193] In some embodiments, referring to FIG14, the third protrusion 1123 is located at the end of the first box wall 111 near the second box wall 113, and the fourth protrusion 1131 is located at the end of the second box wall 113 near the first box wall 111.

[0194] This helps to shorten the distance between the third protrusion 1123 and the fourth protrusion 1131, thereby allowing the sampling component 13 to be closer to the electrode lead 122 for electrical connection, reducing the size of the sampling component 13, and further reducing the size of the third protrusion 1123.

[0195] In some embodiments, referring to FIG14, the second groove 1123a and the third groove 112a are directly connected to each other so that the sampling component 13 can be connected to the electrode lead-out portion 122 through the connection position of the second groove 1123a and the third groove 112a, thereby reducing the space occupied by the sampling component 13 in the installation space 11a, which is conducive to arranging a larger capacity battery cell assembly 12.

[0196] In some embodiments, the battery cell assembly 12 is a single battery cell 124, which helps to simplify the internal structure of the battery device 10, reduce the number of components in the battery device 10, and improve the energy density of the battery device 10.

[0197] In some embodiments, referring to FIG15, the battery cell assembly 12 includes a housing 125 and a plurality of battery cells 124 housed within the housing 125. That is, the plurality of battery cells 124 are connected in series and parallel to form a battery cell group 124, the housing 125 encloses the entire battery cell group 124, and the battery cell group 124 shares an electrode lead-out portion 122 for charging and discharging.

[0198] Thus, the outer casing 125 helps maintain the external contour of the battery cell assembly 12, especially when the battery cell 124 is a pouch battery cell. This allows the battery cell assembly 12 to be placed neatly and stably inside the battery device 10, improving the space utilization within the battery device 10 and enhancing the safety of use. Furthermore, multiple battery cells 124 located in the outer casing 125 of the same battery cell assembly 12 can be connected to the outside using the same set of electrode leads 122, resulting in a simple structure.

[0199] In some embodiments, referring to Figures 4, 5 and 11, the first box wall 111 includes a body portion 114 and a protrusion 112. The protrusion 112 protrudes from the body portion 114 in a direction away from the installation space 11a, and the maximum protrusion size of the protrusion 112 is less than or equal to 10 mm (millimeters).

[0200] Referring to Figure 11, the maximum protrusion dimension of the protrusion 112 is L11, where L11 ≤ 10 mm.

[0201] This reduces the manufacturing difficulty of forming the protrusion 112, which helps to reduce manufacturing costs; at the same time, it helps to reduce the probability of the protrusion 112 interfering with other objects outside the battery device 10, which helps to improve the adaptability of the battery device 10.

[0202] The specific range of the maximum protrusion size of the protrusion 112 is 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0203] A specific embodiment of the battery device 10 disclosed herein is as follows:

[0204] The battery device 10 includes a housing 11, a sampling component 13, a busbar 14, and multiple battery cell assemblies 12. The housing 11 includes multiple housing walls 110, which together enclose an installation space 11a. The multiple housing walls 110 include a first housing wall 111. A protrusion 112 protrudes away from the installation space 11a, and a groove 112a is provided in the protrusion 112. The opening 11b of the groove 112a faces the installation space 11a so that the space in the groove 112a communicates with the installation space 11a. A plurality of battery cell assemblies 12 are disposed in the installation space 11a. The battery cell assembly 12 includes a first battery cell assembly 12a, which includes a first electrode lead-out portion 1221 and a second electrode lead-out portion 1222. A sampling assembly 13 includes a first sampling assembly 130, which is electrically connected to the first battery cell assembly 12a. The groove 112a includes a first groove 112b. The first electrode lead-out portion 1221, the second electrode lead-out portion 1222, and the first sampling assembly 130 are all located at least partially in the first groove 112b. The length of the first groove 112b is greater than its width. The distance between the farthest points of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the width direction of the first groove 112b is less than half the maximum dimension of the first battery cell assembly 12a along the width direction of the first groove 112b. In a projection plane perpendicular to the length direction of the first groove 112b, the projections of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 at least partially overlap. The first battery cell assembly 12a includes a first edge 12b and a second edge 12c disposed opposite each other along the width direction of the first groove 112b. The maximum distance between the first electrode lead-out portion 1221 and the first edge 12b is less than the maximum distance between the first electrode lead-out portion 1221 and the second edge 12c, and the maximum distance between the second electrode lead-out portion 1222 and the first edge 12b is less than the maximum distance between the second electrode lead-out portion 1222 and the second edge 12c. The sampling component 13 is located between the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 which is closer to the second edge 12c. The first sampling component 130 is located on the same side of the first electrode lead-out portion 1221 and the second electrode lead-out portion 1222 along the groove width direction of the first groove 112b. The sampling component 130 includes a main body portion 131 and a terminal portion 132. The main body portion 131 is attached to the first wall surface 121 and is offset from the electrode lead-out portion 122. The terminal portion 132 is connected to the main body portion 131 and the battery cell assembly 12. The terminal portion 132 is at least partially bent to connect to at least one of the electrode lead-out portion 122 and the busbar 14.The space within the first groove 112b includes a first accommodating space 112c and a second accommodating space 112d. The maximum dimension of the first accommodating space 112c along the groove depth direction of the first groove 112b is smaller than the maximum dimension of the second accommodating space 112d along the groove depth direction of the first groove 112b. The first accommodating space 112c is used to accommodate at least a portion of the sampling component 13, and the second accommodating space 112d is used to accommodate at least a portion of the first electrode lead-out portion 1221 and at least a portion of the second electrode lead-out portion 1222.

[0205] This disclosure also provides an electrical device, which includes the battery device 10 in any of the foregoing embodiments, and the battery device 10 serves as the power source for the electrical device.

[0206] Thus, by improving the compactness of the battery device 10 structure, it is beneficial to improve the compactness of the arrangement of other components in the power device and improve space utilization.

[0207] In some embodiments, referring to Figures 16 and 17, the electrical device is a vehicle 100, which also includes a frame 20, a battery device 10 mounted on the frame 20, and a receiving compartment 20a in the frame 20, with a portion of the protrusion 112 extending into the receiving compartment 20a.

[0208] The frame 20 refers to the frame structure of vehicle 100 formed by splicing together multiple beams.

[0209] The battery unit 10 can be fixedly connected to the frame 20; or the battery unit 10 can be detached to facilitate maintenance and replacement.

[0210] Thus, through the cooperation between the receiving compartment 20a and the protrusion 112, a portion of the battery device 10 can utilize the space inside the frame 20, thereby improving the space utilization rate of the vehicle 100 and increasing the capacity of the battery device 10 in the vehicle 100.

[0211] In some embodiments, referring to FIG17, the frame 20 includes a mounting beam 21 disposed on one side of the battery device 10 along the vehicle height direction. The mounting beam 21 has a receiving compartment 20a, which is open along the vehicle height direction toward the side facing the battery device 10 to form an opening. At least a portion of the protrusion 112 extends into the receiving compartment 20a through the opening.

[0212] Mounting beam 21 refers to a beam structure in the frame 20 that can be used to mount other components in the vehicle 100, such as beam structures for mounting seats, center consoles, doors, etc. The mounting beam 21 used to provide a housing 20a may include at least one of the body beam structures such as seat beams, floor crossbeams, floor longitudinal beams, center channel beams, and sill beams.

[0213] This improves the utilization of the internal space of the mounting beam 21, which is beneficial to increasing the capacity of the battery device 10 in the vehicle 100.

[0214] In some embodiments where the number of protrusions 112 is multiple, referring to Figures 16 and 17, at least some of the protrusions 112 are oriented in the vehicle height direction.

[0215] The specific method by which the mounting beam 21 forms the receiving chamber 20a is not limited. For example, the receiving chamber 20a is formed inside the raised structure formed by bending the plate multiple times, and the opening of the raised structure forms the opening of the receiving chamber 20a.

[0216] In some embodiments, referring to Figures 16 and 17, the vehicle 100 also includes a passenger compartment floor 22, the frame 20 and the passenger compartment floor 22 together enclosing a passenger compartment 20c of the vehicle 100, and the battery device 10 is located on the side of the passenger compartment floor 22 away from the passenger compartment 20c.

[0217] In other words, the casing wall 110 of the battery unit 10 does not form a enclosure for the formation of the passenger compartment 20c. In these embodiments, the mounting beam 21 is connected to the passenger compartment floor 22. Referring to FIG17, the passenger compartment floor 22 has a protrusion facing away from the battery unit 10. The protrusion is open on the side facing the battery unit 10 and extends into the receiving compartment 20a. The protrusion 112 extends into the protrusion so that a portion of the protrusion 112 extends into the receiving compartment 20a.

[0218] In some embodiments, referring to FIG18, vehicle 100 includes a passenger compartment 20c, and a first compartment wall 111 forms the passenger compartment floor 22 of vehicle 100.

[0219] In other words, the first box wall 111 and the passenger compartment floor 22 are the same component, which can be used to directly place the seats, carpets and other components in the vehicle 100.

[0220] This helps reduce the number of parts in vehicle 100 and improves the compactness of vehicle 100's structure.

[0221] The specific type of the storage compartment 20a is not limited, and it can be used to accommodate other structural components, personnel, and cargo in the vehicle 100. In some embodiments, the passenger compartment 20c is part of the storage compartment 20a.

[0222] The various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions.

[0223] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure. Industrial applicability

[0224] This disclosure provides a battery device and a power supply device, which helps to reduce the waste of space inside the box caused by a lot of idle space next to the sampling component, makes the space inside the box for placing individual battery components more regular, makes the structure of the battery device more compact, helps to suppress the probability of bending, twisting and other deformation of the first box wall, and improves the overall structural strength of the box; it can also use protrusions to strengthen the protection of the sampling component.

Claims

1. A battery device, wherein, The battery device includes: The enclosure includes multiple enclosure walls that together enclose an installation space. The multiple enclosure walls include a first enclosure wall. The first enclosure wall has a protrusion that protrudes away from the installation space. The protrusion has a groove, and the opening of the groove faces the installation space so that the space inside the groove communicates with the installation space. Multiple battery cell assemblies are disposed within the installation space; A sampling component for acquiring information about the battery cell assembly, wherein at least a portion of the sampling component is located within the groove.

2. The battery device according to claim 1, wherein, The battery cell assembly includes a first wall and an electrode lead-out portion disposed on the first wall, and the sampling component is located on the first wall. Both the sampling component and the electrode lead-out portion are located at least partially within the groove.

3. The battery device according to claim 2, wherein, Both the sampling component and the electrode lead-out portion are located at least partially within the same groove.

4. The battery device according to claim 3, wherein, The battery device further includes a busbar for connecting the electrode leads of different battery cell assemblies, and the busbar, the sampling assembly, and the electrode leads are all located at least partially within the same groove.

5. The battery device according to claim 3 or 4, wherein, The battery cell assembly includes a first battery cell assembly, the first battery cell assembly includes a first electrode lead and a second electrode lead, the sampling assembly includes a first sampling assembly, the first sampling assembly is electrically connected to the first battery cell assembly, the groove includes a first groove, and the first electrode lead, the second electrode lead and the first sampling assembly are all located at least partially in the first groove.

6. The battery device according to claim 5, wherein, The length of the first groove is greater than its width, and the distance between the farthest points of the first electrode lead and the second electrode lead along the width direction of the first groove is less than half of the maximum dimension of the first battery cell assembly along the width direction of the first groove.

7. The battery device according to claim 5 or 6, wherein, The length of the first groove is greater than its width. In a projection plane perpendicular to the length of the first groove, the projection of the first electrode lead-out portion and the projection of the second electrode lead-out portion at least partially overlap.

8. The battery device according to any one of claims 5 to 7, wherein, The length of the first groove is greater than its width. The first battery cell assembly includes a first edge and a second edge disposed opposite to each other along the width direction of the first groove. The maximum distance between the first electrode lead and the first edge is less than the maximum distance between the first electrode lead and the second edge. The maximum distance between the second electrode lead and the first edge is less than the maximum distance between the second electrode lead and the second edge. The sampling component is located between the first electrode lead and the second electrode lead, whichever is closer to the second edge, and the second edge.

9. The battery device according to any one of claims 5 to 8, wherein, The first sampling component is located on the same side of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove.

10. The battery device according to claim 9, wherein, The first sampling component includes a main body and a terminal part. The main body is attached to the first wall surface and is offset from the electrode lead-out part. The terminal part is connected to the main body and the battery cell assembly.

11. The battery device according to claim 10, wherein, The battery device further includes a busbar, wherein the terminal portion is at least partially bent to connect to at least one of the electrode leads and the busbar.

12. The battery device according to any one of claims 5 to 11, wherein, The first sampling component is located on one side of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove. The space within the first groove includes a first accommodating space and a second accommodating space. The maximum dimension of the first accommodating space along the groove depth direction of the first groove is smaller than the maximum dimension of the second accommodating space along the groove depth direction of the first groove. The first accommodating space is used to accommodate at least a portion of the sampling component, and the second accommodating space is used to accommodate at least a portion of the first electrode lead-out portion and at least a portion of the second electrode lead-out portion.

13. The battery device according to any one of claims 5 to 12, wherein, The first sampling component is located on the side of the first electrode lead-out portion and the second electrode lead-out portion facing the bottom wall of the first groove.

14. The battery device according to any one of claims 2 to 13, wherein, The battery cell assembly includes a first electrode lead-out portion, the sampling assembly includes a first sampling component connected to the first electrode lead-out portion, the protrusion includes a first protrusion and a second protrusion, the first protrusion and the second protrusion are spaced apart on the first casing wall, a first recess is formed in the first protrusion, and a second recess is formed in the second protrusion, the first recess is used to accommodate at least a portion of the first sampling component, and the second recess is used to accommodate at least a portion of the first electrode lead-out portion.

15. The battery device according to any one of claims 1 to 14, wherein, The battery cell assembly includes a first wall and a second wall. The sampling component is located on the first wall, and the second wall is provided with an electrode lead-out portion. The first wall faces the first tank wall.

16. The battery device according to claim 15, wherein, The protrusion includes a third protrusion located on the first box wall, the third protrusion having a second groove with an opening facing the installation space, and at least a portion of the sampling component being located in the second groove; The plurality of box walls also include a second box wall, and the protrusion also includes a fourth protrusion located on the second box wall. The fourth protrusion is provided with a third groove with an opening facing the installation space, and at least a portion of the electrode lead-out portion is located in the third groove.

17. The battery device according to claim 16, wherein, The third protrusion is located at the end of the first box wall near the second box wall, and the fourth protrusion is located at the end of the second box wall near the first box wall.

18. The battery device according to any one of claims 1 to 17, wherein, The battery cell assembly is a single battery cell, or the battery cell assembly includes a housing and a plurality of battery cells housed within the housing.

19. The battery device according to any one of claims 1 to 18, wherein, The first box wall includes a main body and the protrusion, the protrusion protruding from the main body in a direction away from the installation space, and the maximum protrusion size of the protrusion is less than or equal to 10 mm.

20. An electrical appliance, wherein, The electrical device includes the battery device according to any one of claims 1-19, the battery device being used to provide electrical energy to the electrical device.

21. The electrical appliance according to claim 20, wherein, The electrical device is a vehicle, which also includes a frame, and the battery device is mounted on the frame. The frame has a storage compartment, and a portion of the protrusion extends into the storage compartment.

22. The electrical appliance according to claim 21, wherein, The frame includes a mounting beam disposed on one side of the battery device along the vehicle height direction. The mounting beam has the receiving compartment, which is open along the vehicle height direction toward the battery device to form an opening. At least a portion of the protrusion extends into the receiving compartment through the opening.

23. The electrical appliance according to claim 21, wherein, The vehicle includes a passenger compartment, and the first compartment wall forms the passenger compartment floor of the vehicle.

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